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Samsung kept things mostly the same with the Galaxy S26 Ultra this year compared to the S25 Ultra outside of the interesting privacy display. But next year's flagship Galaxy S27 Ultra could finally be the upgrade we're looking for.
A pair of leaks popped up over the weekend, which seem to show several major updates, including a crazy idea for cooling the phone. However, the biggest change is reportedly a much larger battery, which would legitimately be shocking since Samsung has kept the Ultra locked at 5,000mAh for the last seven years.
The battery leak comes from tipster Debayan Roy on X who released some specs for the Ultra.
S27 Ultra versus the S26 Ultra
Per Roy, the S27 Ultra should have a better OLED panel, improved chip set and the new LPDDR6 RAM plus a a battery that he has listed as greater than 6,000mAh. He also suggests it will have Qi2 charging, something that was rumored for the S26 Ultra but ultimately did not come to pass.
Here's how Roy's specs compare to the S26 Ultra.
| Header Cell - Column 0 | Galaxy S27 Ultra | Galaxy S26 Ultra |
|---|---|---|
Display | 6.9" LTPO OLED, M16 panel | 6.9" LTPO OLED, M14 panel |
Processor | Snapdragon 8 Elite Gen 6 (2nm) | Snapdragon 8 Elite Gen 5 (3nm) |
RAM | LPDDR6 | LPDDR5X |
Cameras | 200MP (wide) 50MP (ultrawide), 50MP (periscope telephoto) 5x optical | 200MP (wide), 50MP (ultrawide), 50MP (periscope telephoto) 3x optical |
Battery size | >6,000mAh | 5,000mAh |
Charging | Qi2 | 60W wired, 25W wireless |
Misc. | Aluminum frame, USB 3.2, IP68 | Aluminum frame, USB 3.2, IP68 |
The new 2nm Snapdragon combined with the LPDDR6 RAM should mean the S27 Ultra is far more efficient and powerful than the S26 Ultra. Additionally, it means that it should last longer and that's before you get to how it's getting a larger battery.
For some history, Samsung has used a 5,000 mAh battery in its Ultra series since the Galaxy S20 Ultra. That's seven generations with the same battery capacity. Yes, through more efficient chipsets and optimizations, Samsung has managed to improve battery life every generation — but it's been a surprising oversight on the company's part as rival companies are dropping 10,000 mAh silicon carbon batteries.
Cooling options
According to a new report out of the Korean publication Sisa Journal e, Samsung is apparently considering introducing a liquid cooling system in the S27 series. It's not something you often see in phones, though the RedMagic 11 Pro released in December 2025 does feature such a system.
As far as I know, Samsung last used liquid cooling in the Galaxy Note 9 which launched in 2018.
For the unaware, liquid cooling uses a sealed liquid (usually water) that circulates inside the device to rapidly dissipate heat buildup. Samsung is reportedly exploring liquid cooling or air cooling for its Galaxy phones.
Air cooling is faster than liquid but makes the phones heavier.
“Since liquid cooling using cooling fans has noise issues and many other limitations, we are focusing on liquid cooling and are considering a direction to maximize performance through a structure that connects directly to the AP," said Park Min, a Samsung senior researcher, at a seminar in Korea.
Apparently, Park noted that Apple has already started filing active cooling system patents, and Samsung is trying to be competitive with heat dissipation. "I believe commercialization is not far off," Park reportedly said.
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